Results 141 to 150 of about 1,435,259 (250)
, 2012 本发明涉及取代吲哚类化合物的合成方法，具体的说是一种一锅法合成取代吲哚类化合物的方法。以邻硝基甲苯衍生物与N，N-二甲基甲酰胺二甲缩醛或原甲酸三乙酯为原料，在碱性无氧条件下，在有机溶剂中进行反应，而后加入还原剂进行还原、环化反应，即得到吲哚类衍生物；其中，R为位于4、5、6、7位的单取代或多取代；R取代基为氢、烃基、取代烃基、烷氧基、氨基或卤原子。本发明是用“一锅法”反应直接由常规、易得的邻硝基甲苯类化合物为原料，无需分离、纯化出中间体，通过有效控制反应条件、加料顺序和比例，一锅法合成吲哚衍生物 ...
刘苏静, 张志凯, 夏传海
core
Interventions to Reduce Child Poverty and Its Determinants: A Rapid Overview of Reviews
Poverty &Public Policy, Volume 18, Issue 2, June 2026.ABSTRACT Despite evidence for various child poverty reduction strategies, there is ambiguity regarding the most effective types to inform policy. Thus, we conducted an overview of reviews to systematically identify, appraise, and synthesize interventions for reducing childhood poverty in high‐income country settings.
Omar Dewidar +9 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 1987 新酮醛、十一烯酰乙醛加成物及乙酰乙醛苯甲酰加成物是新鱼腥草素的同系物,系我校天然药物研究室有机合成组研制合成。在研究新鱼腥草素对小鼠移植性肝癌细胞的DNA、RNA及嘌呤合成抑制作用的基础上,又以相同的标记前身物参入方法,对上述三种药物进行研究,借以了解新酮醛等药物体外对小鼠肝癌细胞的DNA、RNA及嘌呤合成的抑制作用,并了解新酮醛在体内和半体内实验条件下的抑瘤作用。
吴乃允
doaj
Long-term follow-up of children with carbamoyl phosphate synthase 1 deficiency detected in newborn screening. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue Ban, 2023 Zhang Z +8 more
europepmc +1 more source
, 2008 一种双环氮杂环荧光或磷光化合物的合成方法：卡宾化合物与2-吡唑啉-5-酮在有机溶剂中经加成-环化反应生成具有双环氮杂环结构骨架的金属卡宾化合物，氧化脱金属后分别得到顺式和反式的双环氮杂环有机化合物。其中顺式的双环氮杂环化合物具有强的荧光性质，可作为蛋白质和细胞分析检测的小分子探针化合物；反式的为非荧光可能具有磷光的化合物。所用的氧化剂为无机或有机氧化剂。反应溶剂为极性或非极性惰性有机溶剂。本发明操作简便，原料易得，反应步骤少，效率与选择性较传统方法好。特别是比较传统合成方法 ...
郑兆艳, 韩秀文, 余正坤
core
Poverty &Public Policy, Volume 18, Issue 2, June 2026.ABSTRACT Cash transfers have become an increasingly important social protection tool in development and humanitarian contexts. In developing countries, cash transfers can be used to build economic resilience. This study examines the effects of unconditional cash transfers on asset accumulation among low‐income households in rural Northern Uganda. Using
Simon Peter Nsereko +2 more
wiley +1 more source
[Advances in the Regulation of Protein Phosphorylation in Streptococcal Cell Wall Synthesis]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanYi S, Peng X, Wang S.
europepmc +1 more source
[Holocarboxylase synthetase deficiency induced by HLCS gene mutations: a rare disease study]. [PDF]
Zhongguo Dang Dai Er Ke Za Zhi, 2023 Li KY +7 more
europepmc +1 more source
, 2004 一种抽空涂晶法合成A型分子筛膜的方法，其步骤为：1)使用真空泵抽空或压缩机压缩的方法在基膜上引入一层均匀分散的分子筛晶种，其抽空或压缩压力为0.0010-0.0500Mpa，浸涂时间为30-300S，浸涂液浓度为1-20g/l，晶粒大小为0.20-10μm。2)采用水热合成法和微波合成法合成A型分子筛膜，合成A型分子筛膜的溶液组成为：aNa2O∶bAl2O3∶5SiO2∶cH2O，其中a＝(20-100)，b＝(0.5-5)，c＝(500-4000)；水热或微波合成，水热合成的温度为323-373K ...
黄爱生, 杨维慎, 刘杰, 李砚硕
core
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Engineering of the catalyst interface and modulation of transition–metal d–band play critical roles in the electrocatalytic hydrogen evolution reaction (HER). Herein, a synthetic strategy is developed to fabricate nitrogen‐doped carbon nanotubes (N–CNTs)–supported Ni3Se4–CeO2 heterojunction catalysts through a facile chemical vapor deposition (
Zhiqiang Sun +10 more
wiley +1 more source